• Proceedings of the Korea Information Processing Society Conference
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• 2000.10a
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• pp.227-230
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• 2000

건설 도면정보의 공유 및 교환은 건설 CALS/EC(Continuous Acquisition & Lifecycle Support /Electronic commerce) 환경의 필수적인 요소이다. 그러나 CAD 시스템의 버전변화와 별도의 한글처리로 인하여 도면정보의 관리 렌 활용에 많은 문제점이 발생하고, 상이한 CAD 시스템간의 파일 교환이 제대로 이루어지지 못하는 등 도면정보 교환을 위한 정보모델의 구축이 절실히 요구되고 있다. 이러한 환경에서 STEP(Standard for the Exchange of Product model data)은 건설 도면정보의 교환 및 공유를 위한 정보모델을 구축함에 있어서 그 활용 가능성이 높다. 본 연구에서는 STEP을 이용하여 건설분야에서 활용 가능한 2차원 도면정보 모델을 개발하고자 한다. 이를 위하여 STEP내의 AP 202를 기반으로, AP 214와 독일의 2차원 도면정보 표준화 프로젝트인 STEP-CDS를 참조하도록 한다. 그리고 실제 개발된 도면정보모델이 기존 CAD 도면 데이터를 제대로 표현할 수 있는지 검증하기 위하여 상용 CAD시스템인 AutoCAD Rl4의 DXF 데이터를 개발된 정보모델로 변환하여 그 결과를 검토하고자 한다. 세부적으로는 DXF 데이터의 도면정보모델로의 변환을 위하여 DXF 구조의 STEP 스키마를 정의한다. 이때 이 스키마와 도면정보모델의 스키마간의 매핑을 위하여 STEP내의 EXPRESS-X를 이용하기로 한다. 또한 도면정보 모델의 데이터의 뷰잉과 브라우징을 위하여 도면정보 뷰어를 개발한다.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.37 no.5
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• pp.693-705
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• 2013

Procedural models have the advantage of being easy to edit simply by changing the values of the parameters of their constructional operations. In previous studies, we have introduced an approach for representing procedural 2D CAD models in ISO 10303 and developed ISO 10303-112 for the exchange of procedural 2D CAD models. In this paper, a method for the development of a procedural 2D CAD data translator supporting ISO 10303-112 is suggested. Furthermore, the core techniques applied to the translator are presented. The feasibility of the proposed method was demonstrated through data exchange experiments using a prototype translator.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.27 no.12
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• pp.2061-2071
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• 2003

The macro-parametric approach, which is a method of CAD model exchange, has recently been proposed. CAD models can be exchanged in the form of a macro file, which is a sequence of modeling commands. As an event-driven commands set, the standard macro file can transfer design intents such as parameters, features and constraints. Moreover it is suitable for the network environment because the standard macro commands are open, explicit, and the data size is small. This paper introduces the concept of the macro-parametric method and proposes its representation using XML technology. Representing the macro-parametric data using XML allows managing vast amount of dynamic contents, Web-enabled distributed applications, and inherent characteristic of structure and validation.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.06a
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• pp.1326-1331
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• 2005

A product is designed through the collaboration among engineers in several fields such as design, analysis, and manufacturing. These series of functions are performed repeatedly during the design process. An easy access and exchange of the model data is one of the important elements that help to shorten production development time. Especially, the importance of data exchange between CAD and CAE applications is increasing in the field of verification and estimation of the products. However, information and knowledge of model which is generated by a CAD software cannot be transferred by a function of CAE software, as an exchange of product data between CAD and CAE applications. It causes a delay in design analysis and eventually discourages a designer's effort in improving his design. Therefore, we need to integrate a commercial CAD and CAE applications effectively and to use the same interface on a product model obtained in a distributed environment. This paper shows how to implement a model exchange between CAD and CAE by a web-service and how to provide a communication environment among engineers.

• Journal of the Korean Society for Precision Engineering
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• v.23 no.12 s.189
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• pp.95-102
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• 2006

A product is designed through the collaboration among engineers in several fields such as design, analysis, and manufacturing. These series of functions are performed repeatedly during the design process. An easy access and exchange of the model data is one of the important elements that help to shorten production development time. Especially, the importance of data exchange between CAD and CAE applications is increasing in the field of verification and estimation of the products. However, information and knowledge of model which is generated by a CAD software cannot be transferred by a function of CAE software, as an exchange of product data between CAD and CAE applications. It causes a delay in design analysis and eventually discourages a designer's effort in improving his design. Therefore, we need to integrate a commercial CAD and CAE applications effectively and to use the same interface on a product model obtained in a distributed environment. This paper shows how to implement a model exchange between CAD and CAE by a web-service and how to provide a communication environment among engineers.

• Proceedings of the Korea Database Society Conference
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• 1997.10a
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• pp.282-301
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• 1997

CALS $\textbullet$ Computer Aided Logistic Support $\textbullet$ Continuous Acquisition and Lifecycle Support $\textbullet$ Commerce at Light Speed (광속의 상거래) $\textbullet$산업의 인터넷 CALS 표준화의 필요성 $\textbullet$ 독일의 자동차 산업 : -110개의 서로 다른 CAD 시스템 사용 $\textbullet$ 제품모델의 교환 문제 -설계단계간의 종적 자료교환 (시간축) -기능설계 부서간의 횡적 자료교환 (공간축)(중략)

• Journal of the Society of Naval Architects of Korea
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• v.38 no.2
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• pp.71-78
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• 2001

In ship building industry, CNC and CAM are mostly applied to NC cutting and manufacturing of propeller and prototype ship model. Herein, prototype ship model is producted by CAD/CAM process. Hull form data is obtained from the ship drawing and used for 3D modeling by CAD software Pro/Engineer. CAD data is transferred into CAM s/w SPEEDplus to perform CNC process and the prototype small ship model is manufactured by CNC machine. To solve data transfer among different systems. IGES and STEP neutral formats are currently used. Herein IGES format is adopted for data transfer between CAD/CAM softwares.

• Journal of the Society of Naval Architects of Korea
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• v.35 no.4
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• pp.98-108
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• 1998

Hull design data is currently prepared by a 2D CAD system and re-input to 3D CAD systems specialized for detail design or to a structural analysis system. In this paper, sharing design data among different CAD systems has been studied. Based on STEP methodology, a neutral model is generated from 2D AutoCAD drawings. To handle a geometric data of this model, the non-manifold model of ACIS is used because it can support various CAD data representation such as 2D graphic entities, 3D wireframe, 3D surface model, and solid B-Rep/CSG model. It is observed that a mon-manifold model can easily be transformed to a 3-D wireframe model for the hull detail design system AutoDef or a FE model for the structural analysis system Nastran.

• Korean Journal of Computational Design and Engineering
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• v.9 no.3
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• pp.226-237
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• 2004

If the topology changes in the re-generation step of the history-based and feature-based CAD systems, it is difficult to identify an entity in the old model and find the same entity in the new model. This problem is known as 'persistent naming problem'. To exchange parametric CAD models, the persistent naming problem and the naming mapping problem must be solved among different CAD system, which use different naming scheme. For CAD model exchange the persistent naming has its own characteristics compare to that for CAD system development. This paper analyses previous researches and proposes a solution to the persistent naming problem for CAD model exchanges and to the naming mapping problem among different naming schemes.

• Korean Journal of Computational Design and Engineering
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• v.6 no.4
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• pp.254-262
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• 2001

It is not possible to exchange parametric information of CAD (Computer Aided Design) models based on the current version of STEP (Standard leer the Exchange of Product model data). The design intent can be lost during the STEP transfer of CAD models. The ISO Parametrics Group has proposed the SMCH (Solid Model Construction History) schema in June 2000 that includes structures fur exchange of parametric information. This paper proposes the macro parametric approach that is intended to provide capabilities to transfer parametric information. In this approach, CAD models are exchanged in the form of macro files. The macro file contains user commands which are used in the modeling phase. To exchange CAD models using the macro parametric approach, modeling commands of commercial CAD systems are analyzed. Those commands are classified by the grouping method suggested by Bill Anderson. As a neutral file format, a standard modeling commands set has been defined. Mapping relations between the standard modeling commands set and the native modeling commands set of commercial CAD systems are defined.